Raise your hand if you had never heard of Tetralogy of Fallot with pulmonary atresia before Monday's episode of ABC's Jimmy Kimmel Live.上句中的had never heard of是虚拟语气吗,表达怎样的含义?谢谢老师的回答。
为什么字典上标注的副词,但是他的用法看着不是呢?
They have introduced a new system whereby all employees must undergo regular training.
a proposal whereby EU citizens would be allowed to reside anywhere in the EU
它应该怎么用?